Venetian blind



' June 8, 1937. J. NISENSON 2,083,523

I VENETIAN BLIND Filed March 6, 1936 2,? /a a A6 /4 ATTORNEY.

I Jam/5' WEE/V517, INVENTOR.

BY I I walla/J 7w ings or slots which are placed at a uniform pre-,.

Patented June 8,- 1931 ,UNI'TED s'rA ss PATENT OFFICE min- Julius slam... Brooklyn, N. Y. lilllicatlon March e, 1936, Sei-iaLNo. 01.499

soommsfi (Cl. 156-17).

This invention relates generally to. improve ments in window blinds of a class known as Venetian blinds, and more particularly to improvements in the head-piece therefor.

An objector the present invention liesin the provision of-structure whereby the tape carrying tilt plates together with the elevating cord guides may be independently adjusted as a unit with respect to .the head-piece or casing. v

Where head-piececasings having provision for longitudinal adjustment (for example those described in my copending applications filed November 26, 1935, and bearing Serial Numbers 51.63.! and 51,638) are utilized in conjunction with nonadjustable cut-to measure slats, it has been found necessary .to carefully determine and to accu-'- rately cut, with relation to the terminals thereof, the openings or slots in said slats through which the elevating cords will pass. This operation must be individually calculated and performed for eachwindow, because as the effective length of the casing is varied by adjustment. the elevating cord guides are altered in distance from the new ends of the casing. All of this makes it necessary to determine the position which the elevating the position of the slots in the slats.

By means of the present invention, however, it is possible to utilize slats which although cut to length are provided with elevating cord opendetermined distance from the slat terminals re I gardless of the' length of the particular slat.

v the operation of the tilt plates. therein is undis- Such a practice permits of economies in the manufacture of -the slats and makes the proper installation of. the completeblind a simple matter. Another object of this invention is the provision of structure whereby the tape carrying tiltplates and elevating cord guides may be independently adjusted as a unit after the headpiece or casing is installed and without removing is in placeat the window so that any peculiarities of the particular window installation may be rapidly compensated for, and this without any special skill. 4

An advantage of the present structure is that turbed by the shifting of said structureand said tilt plates may be of the driven type or of the .cords and guides therefor will take when the blind is installed and to correspondingly shift the appended claims.

Another advanta e l es in the novel structure of the elevating cord guide which combines lightness, strength and simplicity; making for econom ical manutacture. i These objects, further features, incidental ends and advantages will more fully appear in the progress'of this disclosure and as pointed out in In the accompanying drawing, similar reference characters designate corresponding parts throughout the several views in which:

Figure 1 is a. fragmentary front elevational view of the right hand end of a head-piece casing containing a preferred embodiment of the invention,

with the'front'wall of said casing being broken;

away. In this view the casing. is shown as installed on a relatively narrow window casement. 1 Figure 2 is a view similar to'Figure 1 with the end latching plate extended,'however, and the elevating cord guide assembly shifted in position.

In this view ,the casing is shown as installed on cord guide and tilt plate assembly with the tilting rod and elevating cords omitted for purposes of clarity.

Figure 4' is a fragmentary horizontal sectional view of Figure 1 taken along the plane 4-4 thereon with the elevating cords omitted.

Figure 5 is a transverse vertical sectional view portion of-the head-piece casing, the elevating of Figure 1 taken along the plane 5-5 thereon.

In the drawing it will be noted that only the right hand upper corner of a Venetian blind is shown. It will be understood that since bothends of the headpiece are correlative and similar in construct-ion except that one may be described pertains to understand my invention.

The head-piece frame or casing indicated generally by numeral lllis substantially U shape in cross section (see Fig. 5), and is comprisedv of a base II, a rear wall [2, a front wall I3 and an extendible latchingplate ll. Tfhe casing lll is adapted vto be placed within a pair of mounting brackets l5 and to be locked in place by engagement of plates H with the latching flanges It. 'I'he tilt plate and elevating cordguide assembly is indicated generally by numeral I1. A pair of oppositely disposed right angle plates l8 are secured together by a palroi opposed vertical right angles thereto. The terminals 28 are passed a throughthe orifices 2| and then secured to the outer surfaces of plates il in any suitable manner as for example by spot welding at the 'plates i3 and I3 thus form an integral unit as best seen in Figure 4.

A roller or pulley 24 is trunnioned in and between plates i8. In order to simplify the assembly. pulley 24 .is preferably provided with an integral axle 25 and the terminals of axle 26 are inserted in suitably disposed orifices in plates l3 prior to the welding operation recited above. After the welding is completed, removal of pulley 2024- is thus positively prevented.

Plates i8 and associated parts are maintained in position by screws 26 which penetrate the slots 21 in base It and threadedly engage the horizontal portions of plates l8. V 25 A tilt plate 28 is provided with a pair of tilting tapes (only one of said tapes indicated bynumeral 29 being shown on the drawing, in Fig.1) which support'and tilt the plurality of slats ordinarily employed in the Venetian blind, only 30 the top slat 30 being shown in the drawing. The

tilting tapes are maintained in position by clamping bars 3i which are operated by screws 32 in threaded engagement with tilt plate 23. A

pair of downwardly bent right angle ears 33*in-, tegral with plate 28 are mounted between plates i3 and upon a tilt rod 34. Rod 34 penetrates aligned orifices in the vertical portions of plates" l8 and in the ears 33. Rod 34 is preferably 'provided with an irregular circumference as! for 40' example a plane side as indicated by numeral 35 on Fig, 5. Inthis manner, when it is desired to rotate the tilt plate 28 with the rotation of rod 34, the ears 33 may be suitably orificed to correspond tqthe circumference of the rod 34 and thus be keyed thereto, or conversely, when 'it is rod 34, fire orifices in ears 33- may be circular as shown in Figure 5. Rod 34 inay be rotated by ,any suitable'means known in the art and the same is considered as" not being important tothe presentdiscl'osure and therefore is not specifically described or illustrated.- ,It is to be noted however. that the adiustments'descrlbed below are performed without altering theposition of the rod 34 with respect to the headpiece l8. An elevating cord 36 is fastened at thelower end thereof to a weightbar (not shown) well known in the'art, and said cord passes through transverse slots 31 in the slats 38. It isv the uniform placement of slots 31 with relation to the terminals of slats 38 regardless of the window casement width which constitutes one of the objects of this invention. Cord 36 leaving top slat 38 passes upwardly through the large rectangular orifice 38,- between plates is, contacts pulley 24, through orifice 2|, over. a roller, and thence downwardly through an orifice (not shown) in base ll. Roller 38 is 'rotatably mounted on casing ill .and any suitable' means known in the 'art may be utilized for locking cord 36' in any displaced position thereof.

Another elevating cord 48 comes from an assembly similar to assembly l1, and located at the.opposite end of the headpiece l8 and passes 75 through the both orifices 2| and thence downpoints indicated by numeral. The pairs of desired'that the tilt plate 28 rotate freely about 5 wardly over roller 33. The cord 48 is protected from undesirable abrasion by the rounded smooth surfaces it contacts, namely terminals 23, tabs 22 andpulley24. The use and operation of the inventionis as follows: Slats 38 are cut to the desired length to fit the" particular casement, and are then slotted at 31 a predetermined distance from the ends thereof, as for example 6 inches which is present common practice. Theentire blind is assembled and the brackets l6 put in place on the easement. The head-piece I8 is then installed in the brackets 'II and properly centered, and the plates i4 are latched behind flanges I6. Screws 26 are next loosened and the assembly I1 is manually shifted (preferably by-pushing the opposed inner vertical faces of the plates II with the fingers of the hand penetrating. the orifice 38) until the cord 36 passes unrestrictedly through the slot 31 and the ends of the slats 38 are equidistant from the adjacent vertical portions of the window casement. Tightening screws 26 securely locks the assembly i1 in place. Sincethe whole assembly i1 is moved as a unit, theelevating cord is always concealed by the tapes 23 and is properly centered therebetween.

The length :of the slots 21 and orifice 38 is largely determined by the amount of variation permitted in the effective length of the headpiece or casing III, which is in turn determined by the particular means employed for varying the effective length of said head-piece or casing;

forpurpose of illustration only.

Thevarious adjustments outlined above are re- I quired only once when the Venetian blind is first installed in a given window casement. Subsequent removal or replacement requires only the manipulation of the latching plates l4. v

' The foregoing disclosure is to be regarded as descriptive and illustrative only. and not as restrictiveor liinitative of the invention, of which obviously an embodiment may be constructed including modifications without departing from the general scope herein indicated and denoted in the appended claims.

Having thus described my invention, what I claim as' new anddesire to secure by Letters, Patent, is:

1. In a Venetian blind, a casing-and an elevating cord guide longitudinally shiftable with relation to said casing.

2. .In' aVenetian blind, acasing and a tilt plate longitudinally shiftable with relation to said cas- 3; In a Venetian blind, a casing, and an elevating cordgu ide and tilt plate assembly, said assembly being in shiftable longitudinal relation with-said casing. I

4. In .a Venetian blind, a casingv having an orifice therein through which an elevating cord may pass, and an elevating cord guide longitudinally shiftable with relation to said casing.

5. In a Venetian blind-, -a' casing having an orifice therein through whichtilting tapes may 6 relation to said casing. in a longitudinal direc- .tion.

'2. In a Venetian 'blind, a casing, and an elethe means shown in the present disclosure vating cord guide longitudinally shiftable with 7 relation to said casing, including means to fix 'thesaid guide in any adjusted position thereof.

8. In a Venetian blind, a casing, and a tilt plate longitudinally shiftable with relation to" said casing, including means to fix the said tilt plate in any longitudinally adjusted position thereof.

9. In a Venetian blind,-a'casing, and an elevating cord guide and tilt plate assembly longitudinally shiftable with? relation to said casing, including means. to fix the said assembly in any longitudinally displaced position thereof.

10. In the Venetian-blind,'the combination of a casing. having the effective length thereof adjustable, with an elevating cord guide longitudi-.

nally" shiftable with relation to said casing.

11. In a Venetian blind, the combination of a casing having the effective length thereof adjustable, with a tilt plate longitudinallyshiftable with relation to said casing.

. 12. In a Venetian blind, the combination of a casing having the effective length thereof adjustable, with an elevating cord guide and tilt plate assembly longitudinally shiftable with relation to said casing.

l3.' In a Venetian blind,.'an elevating cord guide including-a vertically disposed plate having an orifice formed therein and an integral angle tab disposed substantially parallel with the direction of travel. of an elevating cord passed through said orifice and whereby said cord will ride against said tab which constitutes a surface-f reduced frictional and abrasive qualities.

14. In a Venetian blind, a'n' elevating cord guide including a pair of oppositely disposed vertical plates, each of said plates having an orifice formed therein and an integral bent tab disposed substantially parallel with the'direction of travel of an elevating cord p through one of saidv cord will ride against orifices and whereby sa said tab which constitutes a surface of reduced frictional and abrasive qualities.

15. In a Venetian blind, an elevating cord guide including a pair of oppositely disposed angle plates, each of said angle plates having an orifice formed therein, a pair of opposed vertical plates disposed at right angles to the said angle plates and having the terminals of said vertical plates supported by the angle plates.

16. In a Venetian blind, an elevating cordguide, including a pair of oppositely disposed angle plates, each ofsaid angle plates having an orifice formed therein and an integral tab, a pair of opposed vertical plates disposed at right angles to and between the vertical portions of said angle plates and having the terminals of said vertical plates supported by the angle plates.

17. In a Venetian blind, an elevating cord guide comprising a pair of oppositely disposed angle plates, each of said angle plates having an orifice. formed therein, a pair-of spaced vertical plates disposed at right angles to and between said angle plates, terminals on said vertical plates; said. terminals being bent back around edges of the said orifices, whereby an elevating cord passed through one of said orifices and against said terminals will ride against a surface of reduced'frictional or abrasive qualities.

18. In a Venetian blind, an elevating cord guide comprising a pair of oppositely disposed angle plates, each of said angle plates having an orifice therein and an integral tab turned back .-at least 90 degrees therefrom, a pair of spaced vertical plates disposed at right angles to-and between said-angle jplates, terminals on said vertical plates, said terminals being bent back around edges of said orifices, whereby an elevating cord passed through one of said orifices and against said tab or said terminalswill ride against a surface of reduced frictional or abrasive qualities.

19. In a Venetian blind, an elevating cord guide comprising a pair of oppositely disposed angle plates, each of said angle plates. having an orifice formed therein and an integral tab turned back at least 90 degrees therefrom, a

pair of opposed spaced vertical plates disposed at right angles to and between said angle plates,

terminals on said plates, said terminals being bent back around edgesof the said orifices, a roller trunnioned between said vertical plates, whereby-a cord passed through one of said orifices and against either said tab or said roller or said terminal will ride against a surface of reduced frictional or abrasive qualities.

20. In a Venetian blind, an elevating cord guide and tilting plate unit assembly comprising i scribed. l JULIUS NISENSON. 

